I think you answered that you would assume a man had arranged the seashells. I wasn't asking whether it was a god or not, but whether you would assume something with intelligence arranged them, or whether they were arranged randomly.

Since you (and anyone) would assume it was a man, with intelligence, and there's nothing wrong with that assumption, all I'm saying is that when we see similar patterns in nature and especially in living things, it's not illogical to assume that an intelligence was involved in their design. There may be other explanations, as you have said, but intelligence is one option.

Since we don't know yet, we should be open to consider all options.

This approach does not use any religion or scripture or fairy tales. It's simply a possible logical explanation for the patterns and laws visible in the universe. You yourself said that these laws and patterns might be the result of an alien race. This is Intelligent Design.